A Study on the Influence of Process Parameters on the Workpiece Surface Quality in the Cutting of Hard and Brittle Materials with Trepanning Drill

Hard and brittle materials have excellent physical and mechanical properties and are widely used in the fields of microelectronics and optoelectronics. However, due to their high hardness and brittleness, the machining quality of a workpiece struggles to meet the requirements of practical applicatio...

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Bibliographic Details
Published in:Materials 2023-09, Vol.16 (18), p.6114
Main Authors: Yu, Ruijiang, Li, Shujuan, Zou, Zhengkang, Liang, Lie, Zhang, Jiawei
Format: Article
Language:English
Subjects:
Accuracy
Brittle materials
Brittleness
Chipping
Crack propagation
Drilling
Efficiency
Errors
Experiments
Feed rate
Machining
Mathematical models
Mechanical properties
Optical glass
Optoelectronics
Physical properties
Prediction models
Process parameters
Surface properties
Surface roughness
Trepanning
Workpieces
Citations: Items that this one cites
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Summary:Hard and brittle materials have excellent physical and mechanical properties and are widely used in the fields of microelectronics and optoelectronics. However, due to their high hardness and brittleness, the machining quality of a workpiece struggles to meet the requirements of practical applications. In order to improve the surface quality of deep-hole machining of hard and brittle materials, this article analyzes the formation mechanism of surface roughness and the exit-chipping width during the drilling machining of hard and brittle materials and establishes a mathematical prediction model for the surface roughness and the exit-chipping width of hard and brittle materials using a trepanning cutter. The experimental study on K9 optical glass machining shows that the surface roughness of the workpiece and the exit-chipping width increase with the increase in feed rate, and decrease with the increase in rotational speed. Through comparison and verification between theoretical and experimental values, the average errors of workpiece surface roughness and the exit-chipping width are 13.15% and 6.73%, respectively. This article analyzes the reasons for the errors. The results indicate that the theoretical model proposed in this article can be used to predict the surface roughness and the exit-chipping width of hard and brittle materials processed under the same conditions, providing a theoretical basis to optimize process parameters to improve the surface quality of the workpiece.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16186114